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A real-time cycle slip repair method using the multi-epoch geometry-based model
GPS Solutions ( IF 4.9 ) Pub Date : 2021-02-15 , DOI: 10.1007/s10291-021-01098-y
Wenhao Zhang , Jinling Wang

Unrepaired cycle slips in carrier phase measurements will result in re-initializing integer ambiguities, during which positioning accuracy will be compromised. However, the issue of cycle slip fixing has yet to be completely solved, which impedes the realization of continuous high-precision positioning, especially in real-time precise point positioning applications. Traditional cycle slip (detection and) repair methods only use adjacent epochs to estimate cycle slips in real-time processing. Research indicates that using multiple epochs in the time-differencing model of cycle slip estimation could significantly improve cycle slip repair in real-time processing. A multi-epoch geometry-based cycle slip repair method is introduced, and it can also be implemented in real-time processing. A comparative study, including the theoretical model strength and real repairing rates for static and kinematic datasets, is performed under identical settings. The result demonstrates that a considerable number of the cycle slips unrepaired by the existing methods can be fixed by using the enhanced new method. In a low sampling rate static experiment, the average repair rates of the cycle slips unrepaired by the single-epoch geometry-based method and multi-epoch geometry-free method can be improved from 98.2% and 37.6% respectively to 99.3% by the new method using 4 epochs. In kinematic experiments, significant improvement is observed in shipborne, land-based, and airborne experiments using the new method compared with the existing methods.



中文翻译:

基于多时期几何模型的实时周期滑移修复方法

载波相位测量中未经修复的周跳会导致重新初始化整数模糊度,在此期间会降低定位精度。但是,循环滑动固定的问题尚未完全解决,这阻碍了连续高精度定位的实现,尤其是在实时精确点定位应用中。传统的循环滑移(检测和)修复方法仅使用相邻的时期来估计实时处理中的循环滑移。研究表明,在循环滑移估计的时差模型中使用多个时期可以显着改善实时处理中的循环滑移修复。介绍了一种基于多周期几何的循环滑移修复方法,该方法也可以在实时处理中实现。比较研究 在相同的设置下执行包括静态和运动数据集的理论模型强度和实际修复率在内的操作。结果表明,使用改进的新方法可以修复大量现有方法未修复的周跳。在低采样率静态实验中,新的单周期几何方法和多周期无几何方法未修复的循环滑动的平均修复率可以从98.2%和37.6%分别提高到99.3%使用4个时期的方法。在运动学实验中,与现有方法相比,在使用新方法的舰载,陆基和空降实验中观察到了显着改进。结果表明,使用改进的新方法可以修复大量现有方法未修复的周跳。在低采样率静态实验中,新的单周期几何方法和多周期无几何方法未修复的循环滑动的平均修复率可以从98.2%和37.6%分别提高到99.3%使用4个时期的方法。在运动学实验中,与现有方法相比,在使用新方法的舰载,陆基和空降实验中观察到了显着改进。结果表明,使用改进的新方法可以修复大量现有方法未修复的周跳。在低采样率静态实验中,新的单周期几何方法和多周期无几何方法未修复的循环滑动的平均修复率可以从98.2%和37.6%分别提高到99.3%使用4个时期的方法。在运动学实验中,与现有方法相比,在使用新方法的舰载,陆基和空降实验中观察到了显着改进。基于单时期几何方法和无多时期几何方法的未修复的循环滑移的平均修复率可以通过使用4个时期的新方法分别从98.2%和37.6%提高到99.3%。在运动学实验中,与现有方法相比,在使用新方法的舰载,陆基和空降实验中观察到了显着改进。基于单时期几何方法和无多时期几何方法的未修复的循环滑移的平均修复率可以通过使用4个时期的新方法分别从98.2%和37.6%提高到99.3%。在运动学实验中,与现有方法相比,在使用新方法的舰载,陆基和空降实验中观察到了显着改进。

更新日期:2021-02-15
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